Trapezoid: 18703

In the ABCD trapezoid: | AD | = | CD | = | BC | a | AB | = | AC |. Determine the size of the delta angle.

Correct answer:

D =  108 °

Step-by-step explanation:

sinD/2=y/2:x cosA=(yx)/2:x A+D=π  D1=π180°3/5π=π180°3/5 3.1416=108  D2=π180°7/5π=π180°7/5 3.1416=252  D3=π180°11/5π=π180°11/5 3.1416=396  D4=π180°1/5π=π180°1/5 3.1416=36   0<D<180°  D=D1=108=108



Did you find an error or inaccuracy? Feel free to write us. Thank you!







Tips for related online calculators
Do you have a system of equations and looking for calculator system of linear equations?
See also our right triangle calculator.
See also our trigonometric triangle calculator.
Try conversion angle units angle degrees, minutes, seconds, radians, grads.

You need to know the following knowledge to solve this word math problem:


 
We encourage you to watch this tutorial video on this math problem: video1

Related math problems and questions: